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nunjucks

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nunjucks

A powerful templating engine with inheritance, asynchronous control, and more (jinja2 inspired)

  • 3.2.4
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  • npm
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Weekly downloads
993K
decreased by-1.53%
Maintainers
5
Weekly downloads
 
Created

What is nunjucks?

Nunjucks is a powerful templating engine for JavaScript, inspired by Jinja2. It is designed to be fast, extendable, and easy to use, making it suitable for both server-side and client-side applications.

What are nunjucks's main functionalities?

Template Rendering

Nunjucks allows you to render templates with dynamic data. In this example, the template 'Hello {{ name }}!' is rendered with the context { name: 'World' }, resulting in 'Hello World!'.

const nunjucks = require('nunjucks');
nunjucks.configure({ autoescape: true });
const renderedString = nunjucks.renderString('Hello {{ name }}!', { name: 'World' });
console.log(renderedString);

Template Inheritance

Nunjucks supports template inheritance, allowing you to create a base template and extend it in other templates. This example shows a base template 'base.html' and an extending template 'index.html'. The rendered output will have the title 'Home' and the content 'Welcome to the homepage!'.

const nunjucks = require('nunjucks');
nunjucks.configure('views');
// base.html
// <html>
// <head><title>{% block title %}Default Title{% endblock %}</title></head>
// <body>{% block content %}{% endblock %}</body>
// </html>
// index.html
// {% extends 'base.html' %}
// {% block title %}Home{% endblock %}
// {% block content %}Welcome to the homepage!{% endblock %}
const renderedString = nunjucks.render('index.html');
console.log(renderedString);

Custom Filters

Nunjucks allows you to create custom filters to manipulate data within templates. In this example, a custom filter 'shorten' is created to truncate a string to a specified length. The template 'Result: {{ message | shorten(7) }}' will render as 'Result: Hello, ' when provided with the context { message: 'Hello, World!' }.

const nunjucks = require('nunjucks');
nunjucks.configure();
nunjucks.addFilter('shorten', function(str, count) {
  return str.slice(0, count || 5);
});
const renderedString = nunjucks.renderString('Result: {{ message | shorten(7) }}', { message: 'Hello, World!' });
console.log(renderedString);

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Package last updated on 13 Apr 2023

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